Here's a inside pic of jeans that had the waist taken in. I bought these like this. I didn't like them because I needed them bigger anyway and also thought the whole butt on me looked weird with it taken in, because the right way to take a waist in is to start the taper at the crotch seam and slowly taper up to how much you need the waist in....that will make the back pockets go in more at the top after the waist is taken in. But this may look good on you, I don't know? The tailor that did these was pretty good in my opinion....Just make sure that tailor doesn't cut ANYTHING...he/she should be able to take the waist in with ONLY cutting the waist band in the back, the crotch seam shown here was not cut that was why I was able to take it back out.
I hope this all helps you!! Hemming is really easy if you have a machine, you just have to be able to sew a straight line, the tailored waist is the really tricky stuff IMO